1. Def: development should meet the needs of the present generation without comprising the needs of the future; it implies social justice, as well as environmental sustainability . The remaining should be allocated to some development, possibly by explaining that it aims to ensure long-term management of the resource base (the environment).
2. Concept
   1. Resources for present generation
   2. Resources for future generation
   3. Social justice
   4. Environment sustainability
   5. Other: development, long-term management of resources and environment